On-Call Environmental Geologist

Pinyon Enviromental,; Denver (CO); On-site; USD 34,000 - 62,000; Full time

Job summary

Pinyon is seeking on-call Geologists to provide field support for site characterization and remedial investigations across the Denver Metro area and greater Colorado region. You will lead on-site activities, log soils, supervise drillers, install monitoring wells, and collect samples, all while coordinating with project managers and clients.

The role emphasizes independent field work, regulatory knowledge, and the ability to travel within Colorado.

Qualifications

• Bachelor's degree in Geology or related field.
• Minimum of 4 years of environmental consulting or site characterization experience.
• Experience with soil logging, monitoring well installation, and soil/groundwater sampling.
• Experience supervising drillers and subcontractors on active field sites.
• Ability to work outdoors in all seasons and respond to on-call dispatch.

Responsibilities

• Perform soil logging and preparation of boring logs in accordance with ASTM D2488 and the USCS.
• Oversee drillers and subcontractors during Phase II ESAs, preliminary investigations, remedial investigations, and environmental audits.
• Plan and execute monitoring well installation, development, and abandonment.
• Conduct soil sampling, groundwater sampling, water level and groundwater gradient surveys, and elevation surveys.
• Operate and maintain field equipment such as PIDs, water level meters, and survey instruments.
• Maintain chain-of-custody documentation and coordinate lab submittals.
• Apply and interpret state and federal environmental regulations.

Skills

Soil logging

Drilling supervision

Environmental sampling

Field safety

Independent work

Communication skills

MS Office

Driver's license

Education

Bachelor’s degree in Geology or related field

Tools

ASTM D2488

USCS

PIDs

Water level meters

Survey equipment

Job description

Pinyon is different… …and we want unique individuals to come learn, grow, and thrive within our employee-owned company, proudly serving our communities for over 30 years. Pinyon is a purpose-driven firm that does work which matters in the communities we live in. Our employee-owners are encouraged to drive their career paths toward their career goals, and we want you to be the next person to experience our welcoming culture where work is rewarding. Let us prove it! Pinyon is a company of opportunity.

About this Position

Pinyon is seeking on-call Geologists to provide as-needed field support for site characterization and remedial investigation projects across the Denver Metro area and greater Colorado region. This is a self-directed, field-focused role where you’ll serve as Pinyon’s on-site geologic lead during subsurface investigations — logging soils, overseeing drillers and subcontractors, installing and developing monitoring wells, and collecting soil and groundwater samples. Work is dispatched on an as-needed basis tied to client project schedules. Ideal candidates are experienced field geologists who are comfortable running a drill site independently, managing subcontractors, and producing defensible field documentation without day-to-day oversight.

Essential Responsibilities

• Perform soil logging and preparation of boring logs in accordance with ASTM D2488 and the Unified Soil Classification System (USCS)
• Oversee drillers and subcontractors during Phase II ESAs, preliminary investigations, remedial investigations, and environmental audits
• Plan and execute monitoring well installation, development, and abandonment
• Conduct soil sampling, groundwater sampling, water level and groundwater gradient surveys, and ground elevation surveys
• Operate and maintain standard environmental field equipment, including photoionization detectors (PIDs), water level meters, water quality meters, multi-gas meters, and survey equipment
• Maintain chain-of-custody documentation and coordinate sample submittal to accredited laboratories
• Apply and interpret state and federal environmental regulations relevant to site characterization and remediation
• Communicate effectively with project managers, clients, subcontractors, and regulatory representatives throughout the project lifecycle
• Maintain project documents, field notes, and records in an organized and easily understood fashion
• Some travel within Colorado is required; majority of work is in the Denver Metro area

Knowledge, Skills, and Abilities

• Bachelor’s degree in Geology, Geologic Engineering, Geoscience, Environmental Science, Environmental Engineering, or a related field
• Minimum of 4 years of relevant environmental consulting or site characterization experience
• Demonstrated field experience with soil logging (ASTM D2488 / USCS), monitoring well installation, and soil and groundwater sampling
• Demonstrated experience overseeing drillers and subcontractors on active field sites
• Ability to work independently on active field sites and respond to on-call dispatch on short notice
• Capacity to work outdoors in all seasons through various kinds of weather; extended workdays may be required
• Effective verbal and written communication skills
• Basic proficiency with Microsoft Office programs
• Valid driver’s license and reliable transportation to reach field sites throughout Colorado
• Employment is contingent upon the results of a background check.

Preferred but not Required Skills and Certifications:

• Wyoming Professional Geologist (PG) registration or equivalent (e.g., AIPG Certified Professional Geo ogist)
• OSHA 40-hour HAZWOPER certification with annual refresher (Pinyon will provide recertification if needed)
• Experience with ASTM E1527-21 and Phase I / Phase II ESA workflows
• Familiarity with state environmental regulations (soil, groundwater, surface water, soil gas, vapor intrusion) in Colorado, Arizona, North Dakota, or Wyoming
• Experience with GPS and field surveying equipment
• Experience with data analysis and visualization in Excel or similar tools
• Familiarity with Colorado asbestos-in-soil regulations and RACS oversight procedures

Familiarity with the following:

• ASTM E1527-21
• State environmental regulations (Soil, Groundwater, Surface Water, Soil Gas, Vapor Intrusion): Arizona, Colorado, North Dakota, Wyoming
• Data analysis and data visualization using Excel or other programs